Why perfect graphene has nonmagnetic state?

Click For Summary
SUMMARY

Perfect graphene, characterized by its two sub-lattices of carbon atoms, exhibits a nonmagnetic state due to the pairing of all its electrons, as indicated by its Lewis structure. The electronic band structure analysis reveals that the Fermi level does not occupy any state, confirming the absence of unpaired electrons. When considering graphene with two vacancies, configurations can arise from either the same or different sublattices, leading to distinct magnetic properties, including ferromagnetic and nonmagnetic states. Understanding these configurations is crucial for grasping the energy dynamics associated with graphene's magnetic behavior.

PREREQUISITES
  • Understanding of graphene's structure and properties
  • Familiarity with electronic band structure analysis
  • Knowledge of Lewis structures and electron pairing
  • Basic concepts of magnetism, including ferromagnetism and nonmagnetism
NEXT STEPS
  • Explore the effects of vacancies in graphene on its magnetic properties
  • Study the implications of Hund's rule in magnetic systems
  • Investigate the electronic band structure of other two-dimensional materials
  • Learn about the applications of magnetic graphene in technology
USEFUL FOR

Chemistry students, materials scientists, and researchers interested in the magnetic properties of graphene and its applications in advanced materials.

Hyeonyeong Kim
Messages
2
Reaction score
0
I'm major in chemistry my undergraduate.. and not good at Physics, Solid states... etc.

I know pure graphene has two sub-lattice because it has two carbon atoms.. and something basic properties.

then, why perfect graphene(no vacancy) is in nonmagnetic?
 
Physics news on Phys.org
Already its Lewis structure should tell you that all electrons are paired. So why do you expect it to be magnetic?
 
  • Like
Likes   Reactions: Hyeonyeong Kim
yes.. that is reasonable.

when I saw the electronic band structure, I could see fermi level does not put on any state.

it say there is not unpaired electron. sorry. I think I had to post more better question.Actually I want to know, when graphene has two vacancy, graphene can get the two vacancy configuration.

1. same sublattice, 2. different sublattice.

I knew there magnetic trend..
1 : ferromagnetic state
2 : nonmagnetic state

I couldn't understand in case of 2, why graphene can get more low total energy?In case of 2, I thought my question has something relation with my first question. that is my mistake.

sorry for my low english level.
 
In case 2 you can draw a Lewis structure where all electrons are paired up, in cade 1 you cannot but get a diradical which by Hund's rule will be a triplet, i.e. ferromagnetic.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 5 ·
Replies
5
Views
4K
Replies
1
Views
6K
  • · Replies 5 ·
Replies
5
Views
4K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
3
Views
5K
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
10K
  • · Replies 3 ·
Replies
3
Views
5K